Protocol 66 is the first Malin note dated after the Cuban Missile Crisis, on 11 November. The tone of the protocol indicates that Castro is not pleased with Khrushchev's handling of the crisis, and there is a growing sense of distance between Cuba and the Soviet Union.

The telegram bears on the circumstances surrounding Fidel Castro's controversial 27 October letter to Khrushchev. Alekseev describes Castro's demeanor as being irritated and paranoid at the time of writing the letter. He provides background on Castro's actions and attitudes at the peak of the crisis, and especially his nocturnal visit to the Soviet embassy and preparation of his letter to Khrushchev on the night of 26-27 October. He advises Moscow on how to handle the Cuban leader, and offers analysis into the emotions and overall mood of Castro and his associates at that moment in the crisis.

A telegram dispatched from the Soviet embassy in Havana early on the morning of Saturday, 27 October 1962. Fidel Castro was at the embassy and composing an important "personal" message for Nikita Khrushchev. The alarmed Cuban leader anticipated US invasion in the next "24-72 hours."

A report on Alekseev's 23 October 1962 conversation with Fidel Castro, together with two members of the Cuban leadership, the day after the public crisis began. Presented with official Soviet statements on the crisis, Castro reviews the situation and confidently vows defiance to the US "aggression," which he claimed was doomed to failure.

Memorandum of conversation between Soviet Ambassador Vorotnikov and Fidel Castro

Memorandum of conversation between Castro and Honecker regarding the bilateral relations, US-Cuban relations, and Soviet-Cuban relations

Memorandum of conversation taken during the secret meeting between Alexander Haig and Cuban Vice Premier arranged by Carlos R. Rodriguez, Mexican Foreign Minister, in Mexico City

Kuznetsov’s record of a conversation with U Thant discussing the dismantling of Russian weapons and the American quarantine.